How many bits does EXP occupy in the MPLS label header?()
第1题:
Which two QoS classification and marking statements are true?()
第2题:
In a frame ,the MPLS label is imposed().
第3题:
Which statement correctly describes the disabling of IP TTL propagation in an MPLS network?()
第4题:
Where is the MPLS label imposed?()
第5题:
How many bits are contained in each field of an IPv6 address?()
第6题:
Which of the following is true about the MPLS header and its EXP field size?()
第7题:
An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?()
第8题:
Label
VPI VCI
EXP
TTL
FCS
S flag
第9题:
8
4
3
1
2
第10题:
It adds the VPN label into the top label in the MPLS label stack
It replaces the top label in the MPLS label stack with a VPN label and propagates
It replaces the bottom label in the MPLS label stack with a VPN label and propagates
It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packets
None of above
第11题:
It performs a label pop operation and an IP lookup.
It performs a label swap operation and an IP lookup.
It sends an error message toward the egress router.
It sends an error message toward the ingress router.
第12题:
EXP bits
VPI / VCI
shim header
SNAP header
第13题:
In the context of MPLS,what is the correct action to be performed when an aggregate label is received ?()
第14题:
A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?()
第15题:
How many simultaneous Telnet sessions does a Cisco router support by default?()
第16题:
As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?()
第17题:
In Any Transport over MPLS (AtoM) Control word is an optional 4-byte field used in the pseudowire packet.The control word carries generic and Layer 2 payload-specific information to emulate L2 packets correctly.In pseudowire packet, where is this Control Word inserted?()
第18题:
How many messages does Internet Key Exchange use to negotiate SA characteristics when it runs inaggressive mode?()
第19题:
The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSR
TTL propagation cannot be disabled in an MPLS domain
TTL propagation is only disabled on the ingress edge LSR
The TTL field of the MPLS label header is set to 255
The TTL field of the IP packet is set to 0
第20题:
In a Frame Relay network, delay sensitive traffic is tagged with the discard eligible (DE) bit.
In an MPLS network, the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.
In an MPLS network, the MPLS EXP bits are used to identify up to 16 CoS values.
The differentiated services code point (DSCP) field consists of the first three bits of the IP precedence field in the header of an IP packet.
The 802.1Q standard uses a three bit field referred to as the user priority bits (PRI) to mark packets as belonging to a specific CoS.
第21题:
after the Layer 3 header and before the Layer 2 payload
after the Layer 3 header and before the Layer 4 payload
after the Layer 2 header and before the Layer 1 payload
after the Layer 1 header and before the Layer 2 payload
after the Layer 2 header and before the Layer 3 payload
第22题:
第23题:
The MPLS header is 2 bytes,and the EXP field is 3 bits long.
The MPLS header is 1 byte,and the EXP field is 3 bits long.
The MPLS header is 4 bytes,and the EXP field is 3 bits long.
The MPLS header is 3 bytes,and the EXP field is 3 bits long.